Production of warp knitted fabrics



y 7, 0- P. SCHONFELD 2,199,449

PRODUCTION OF WARP KNITTED FABRICS Filed July 20, 1939 2 Sheets-Sheet 1 Jnrgn/ar: PAUL SCHONF'ELD M y 0- P. SCHONFELD 2.199.449

PRODUCTION OF WARP KNITTED FABRICS Filed Jul 20, less 2 Sheets-Sheet 2' Jnyenbr: PAUL. ScHSNr-ELD 4e Attorneus= Patented May 7, 4

UNITED v STATES PATENT orrlcs PRODUCTION OF WARP KNITTED FABRICS Paul Schiinfeld, Chemnitz, Germany Application July 20, 1939, Serial No. 2s5,495

. In Germany July 23, 1938 3 Claims. (01. sc-sci machine warp fabric in which the upper thread group is wholly or party interlaced without forming meshes the threads of this upper group of textile threads form meshes also in the courses following those'in which the rubber threads form meshes. The heads of'the rubber threadmeshes are thus caught by thefeet of these meshes of ,the upper textile thread group, provided the latter is worked in a specific manner, which may sometimes be undesirable with respect to patterning or for other reasons.' Furthermore, the rubber thread meshes cannot be caught at all unless the rubber warp threads are positioned between two textile thread groups, and the proposal does therefore not apply to warp knittedfabric comprising only a single textile thread group. v

The object of the invention is to overcome the diificulties mentioned in the production of warp knitted fabric of this type by lapping the rubber threads in the courses following those in which,

they form meshes over two needles in a meshforming manner so that the head of the, rubber thread meshes formed first is caught by the mesh, arranged in the same wale, of the two superposed rubber thread meshes. v

In this way, the rubber threads themselves -are caused to hold the meshes formed by them and are thus fully secured against running back without requiring special means, particularly because the tying action of thecatching mesh of the pairs of rubber threadmeshes is enhanced' with respect to the rubber thread meshes caught by the rubber thread mesn adjacent to the catchlaterally racked to' insure their tying up in the single machine fabric. Furthermore, to prevent them from running back the rubber warp threads 2 are. formed into meshes in spots simply by being guided once around their needlesin the 5 courses concerned, i. e., in the courses 3 in the example shown. The rubber threads 2 are then lapped again over two needles in a mesh forming manner in the following courses 4 with the result that the hea of the first formed rubber thread 10 meshes is he d in the finished fabric by the feet of. the respective mesh 'of these two rubber thread meshes formed in the courses 4. The course of the rubber warp threads between these mesh forming points and the manner of 15 v I thread groups.

It is evident that the .double meshes of the 20.

rubber warp threads 2 in the courses 4 can catch or hold the single meshes of rubber threads of the courses 3 only if these single rubber thread meshes are properly formed. This requires that the rubber threads 2 are introduced during lap- 25 ping into the courses 3 in racking direction at least one needle in front of the needles that" have to be surrounded to form single rubber meshes. In the example shown this point of introduction. of the rubber warp threads 2 is 30 positioned two needles in front of the needles producing these single rubber thread meshes and from thepoints of, introduction to the last-mentioned needles the rubber threads 2 are lapped by an underlaying operation. The same arrange- 35 ment is to be followed if the rubber warp threads are to be worked into the fabric exclusively in the form of single meshes.

Icl'aim: 60 1. A 'method ofproducing warp knitted fabric provided'with rubber warp threads which form meshes in spots, consisting in lapping the rubber threads in the courses following those in which they form meshes over two needles, in meshforming manner and thereby causing the head of the first formed meshes to be caught by the mesh, arranged in the same Wale, of the two superposed rubber thread meshes.

2. A method according to claim 1, in which during lapping oi the single rubber thread meshes the rubber warp threads are introduced in racking direction into the courses concerned at least one needle in front of the needles to be surrounded to form these single meshes and from the point of introduction to the needles producing the rubber thread meshes are lapped in the form of an underlaying operation.

3. A method according to claim 1, in which during lapping of the single rubber thread meshes the rubber warp threads are introduced in racking direction into the courses concerned at least one needle in front of the needles to be surrounded to form these single meshes and from the point of. introduction to the needles producing the rubber thread meshes are lapped in the formof an undrlaying operation and in which the rubber thread group, at least for forming single meshes, is laterally racked in the same *10 direction as the ground thread group.

PAUL sandman). 

